Apply Existing Payments from Orders When Merging or Backordering Sales Orders

Feature Request to apply existing Payments on Sales Orders when Merging or Backordering Sales Orders.  Currently, when sales orders are merged or backordered, the original payments are not carried over to the new order and have a “Payment Owing” on the new order and an “Overpayment” on the old/ original order.  We are having to manually update this, checking all the Open Sales Orders one by one and its very time consuming.